ACL Bearings 4B8351H-.50 Race Series 0.50mm Oversize Connecting Rod Bearing Set

The ACL Race Series 4B8351H-.50 connecting rod bearing set is engineered for high-performance and racing applications requiring 0.50mm oversize bearings. This bearing set features ACL's high-strength tri-metal construction with a hardened steel backing, copper-lead intermediate layer, and lead-tin overlay, delivering excellent oil film retention and fatigue resistance, even under sustained high RPM use.

Key Features:

• High strength overlay plate with reduced thickness for improved fatigue properties
• Hardened steel backs on all rod bearings to improve the support of the bearing lining and assist with bearing retention in the housing
• Elimination of flash plating on the back of the bearings to improve heat transfer through the bearings and to maximize the grip between the bearings and its housing
• Increased eccentricity to compensate for bore distortion at high rpm and to assist in the formation of hydrodynamic oil films
• Enlarged ID chamfers on bearing edges where required to accommodate large fillet radius on performance crankshafts
• Micron tolerance machining supported by precision measurement systems delivers consistent accuracy to key characteristics like wall thickness and crush

ACL Race Series performance engine bearings are recognized as a premier brand throughout the motorsports world. Race Series rod and main bearings are standard components in race engines that have set records and won championships from Mexico to Bonneville - from sport compact drift racing to small block NASCAR, IHRA, and NHRA competitions. The 0.50mm oversize specification accommodates reground crankshaft journals, making this an essential component for engine rebuilds and high-performance modifications.